And you need to read my response, because I had read the line you're trying to point out. So here's mine since it went over your head:
You're quoting from the new housing reclamation guidelines. The inquiry was aimed at other previously existing systems besides those from the new housing reclamation guidelines.
For private housing, the housing reclamation system requires you to:
A) enter your house once every 45 days.
B) build a house on your property within 45 days of purchasing the land so you can enter said house once every 45 days (DUH!).
The question was whether or not there were any additional time limits outside that system. And the answer is, again, "no". Before the housing reclamation system was introduced you could allow a lot to sit without a house on it until the end of time. And if it were not for the new housing reclamation system (which the original poster specifically said they were already aware of) that would still be the case because there are no other time considerations to worry about outside of the new housing reclamation system.
Let me rephrase her question so it's super simple for you:
Q: Besides the housing reclamation system, in regards to owning property are there any other time-limit considerations to consider?
A: No.
Here's another way of asking the same question:
Q: I built a time machine and intend to travel a year into the past and buy FFXIV property back when it was still available. Other than the looming housing reclamation system that will eventually be added to the game, are there any other time limit considerations to consider?
A: No.
I can think up some more if the lot of you are still confused. :P
